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A248985
Number of length n+4 0..6 arrays with every five consecutive terms having two times the sum of some three elements equal to three times the sum of the remaining two
1
2817, 4137, 6065, 8873, 12937, 18737, 30017, 47953, 76161, 119849, 185817, 315929, 533433, 891593, 1468537, 2367257, 4153753, 7216889, 12373897, 20836977, 34213297, 60900465, 107177641, 185861593, 316071033, 523226617, 937146425
OFFSET
1,1
COMMENTS
Column 6 of A248987
LINKS
FORMULA
Empirical: a(n) = a(n-1) +39*a(n-5) -39*a(n-6) -570*a(n-10) +570*a(n-11) +4091*a(n-15) -4091*a(n-16) -15591*a(n-20) +15591*a(n-21) +31408*a(n-25) -31408*a(n-26) -30261*a(n-30) +30261*a(n-31) +8974*a(n-35) -8974*a(n-36) +872*a(n-40) -872*a(n-41) +3008*a(n-45) -3008*a(n-46) -1024*a(n-50) +1024*a(n-51)
EXAMPLE
Some solutions for n=6
..0....0....5....4....0....1....0....2....3....6....6....0....0....6....3....5
..3....3....1....1....1....3....3....0....1....5....5....2....6....0....0....4
..3....0....3....2....1....6....0....6....5....0....5....1....3....6....1....4
..0....0....0....3....0....5....6....3....0....3....6....3....5....5....1....2
..4....2....1....0....3....5....6....4....6....6....3....4....6....3....0....5
..0....0....0....4....5....1....0....2....3....6....6....5....5....1....3....5
..3....3....1....1....1....3....3....5....6....0....5....2....6....0....5....4
..3....0....3....2....1....6....5....6....0....5....0....6....3....1....6....4
..0....0....5....3....0....5....6....3....0....3....6....3....5....0....1....2
..4....2....6....0....3....0....6....4....6....6....3....4....6....3....5....0
CROSSREFS
Sequence in context: A202375 A236135 A179159 * A236794 A182151 A365023
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 18 2014
STATUS
approved